CN209250500U - A kind of three-phase power electronic transformer - Google Patents
A kind of three-phase power electronic transformer Download PDFInfo
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- CN209250500U CN209250500U CN201821908484.XU CN201821908484U CN209250500U CN 209250500 U CN209250500 U CN 209250500U CN 201821908484 U CN201821908484 U CN 201821908484U CN 209250500 U CN209250500 U CN 209250500U
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Abstract
The utility model discloses a kind of three-phase power electronic transformers, including rectification module, isolation module, inverter module and control module；The rectification module accesses three-phase electricity, the rectification module is connect with the isolation module, the isolation module is connected with the inverter module, and the inverter module exports three-phase alternating current, and the control module is connected with the rectification module, the isolation module and the inverter module respectively.The utility model can realize transformation, frequency control using corresponding control strategy by control module according to loaded work piece demand, can well adapt to a variety of work requirements.
Description
Technical field
The utility model relates to technical field of manufacturing semiconductors more particularly to a kind of three-phase power electronic transformers.
Background technique
Electronic power transformer is a kind of by Technics of Power Electronic Conversion technology and transformation of electrical energy skill based on electromagnetic induction principle
Art combines, and realizes the Novel intelligent transformer that a kind of electric energy of electrical nature is changed into the electric energy of another electrical nature.
Electric power electric transformer function is relatively simple in the prior art, cannot well adapt to be used for various working environments.
Utility model content
The utility model embodiment provides a kind of three-phase power electronic transformer, it is intended to solve in the prior art due to not
The problem of capable of being suitable for various working environments well.
The first aspect of the utility model embodiment provides a kind of three-phase power electronic transformer, including rectification module,
Isolation module, inverter module and control module；
The rectification module accesses three-phase electricity, and the rectification module is connect with the isolation module, the isolation module and
The inverter module is connected, and the inverter module exports three-phase alternating current, the control module respectively with the rectification module, institute
Isolation module is stated to be connected with the inverter module；
The control module control the rectification module to the three-phase electricity in power grid carry out rectification generate the first direct current it is defeated
The isolation module is arrived out, and the control module controls the isolation module and carries out isolation processing generation to first direct current
Second direct current is simultaneously output to the inverter module by the second direct current, and the control module controls the inverter module pair
The three-phase alternating current needed for second direct current carries out inversion processing output.
In one embodiment, the rectification module includes the first rectification unit and the first voltage regulation unit；
First rectification unit accesses three-phase electricity, and first rectification unit is connected with first voltage regulation unit；
First rectification unit to the three-phase electricity in power grid carry out rectification generate first direct current be output to it is described
First voltage regulation unit, first voltage regulation unit carry out steady pressure treatment to first direct current, and by described the after pressure stabilizing
One direct current is exported to the isolation module.
In one embodiment, first rectification unit include first switch tube, second switch, third switching tube,
4th switching tube, the 5th switching tube and the 6th switching tube；
The height of the hot end of the first switch tube, the hot end of the second switch and the third switching tube
Potential end is connected, and the cold end of the first switch tube is connected with the hot end of the 4th switching tube, and described second opens
The cold end for closing pipe is connected with the hot end of the 5th switching tube, the cold end of the third switching tube and described the
The hot end of six switching tubes is connected, the cold end of the 4th switching tube, the cold end of the 5th switching tube and institute
The cold end for stating the 6th switching tube is connected, the cold end of the cold end of the first switch tube, the second switch
Three-phase electricity is accessed with the cold end of the third switching tube.
In one embodiment, first voltage regulation unit includes first capacitor；
The high potential of the hot end of the first end of the first capacitor and the first switch tube, the second switch
It holds, the hot end of the third switching tube connects altogether, the low potential of the second end of the first capacitor and the 4th switching tube
End, the cold end of the 5th switching tube, the 6th switching tube cold end connect altogether.
In one embodiment, the isolation module includes transformer, inversion unit and the second rectification unit；
The input terminal of the inversion unit is connected with the output end of the rectification module, the output end of the inversion unit with
The primary side winding of the transformer is connected, and the input terminal of second rectification unit is connected with the vice-side winding of the transformer,
The output end of second rectification unit is connected with the input terminal of the inverter module；
The inversion unit carries out voltage inversion to first direct current and exports the first high-frequency alternating current, the transformer
Voltage transformation is carried out to first high-frequency alternating current and exports the second high-frequency alternating current, second rectification unit is to described second
High-frequency alternating current exports second direct current after carrying out voltage inversion and pressure stabilizing.
In one embodiment, the inversion unit includes the 7th switching tube, the 8th switching tube, the 9th switching tube and the tenth
Switching tube；
The hot end of 7th switching tube is connected with the hot end of the 8th switching tube, the 7th switching tube
Cold end connect with the hot end of the 9th switching tube and be connected with one end of the transformer primary winding altogether, it is described
The hot end of the cold end of 8th switching tube and the tenth switching tube connects and another with the transformer primary winding altogether
One end is connected, and the cold end of the 9th switching tube is connected with the cold end of the tenth switching tube.
In one embodiment, second rectification unit is opened including the 11st switching tube, the 12nd switching tube, the 13rd
Guan Guan, the 14th switching tube and the second capacitor；
The hot end of 11st switching tube, the hot end of the 12nd switching tube and second capacitor
First end connects altogether, the cold end of the 11st switching tube and the hot end of the 13rd switching tube connect altogether and with it is described
One end of transformer secondary winding is connected, the cold end of the 12nd switching tube and the high potential of the 14th switching tube
End connects altogether and is connected with the other end of the transformer secondary winding, the cold end of the 13rd switching tube, the described tenth
The second end of the cold end of four switching tubes and second capacitor connects altogether.
In one embodiment, the inverter module includes the 15th switching tube, sixteenmo pass pipe, the 17th switch
Pipe, eighteenmo close pipe, the 19th switching tube, the 20th switching tube, the 21st switching tube and the 22nd switching tube；
Hot end, the sixteenmo of 15th switching tube close the hot end of pipe, the 17th switch
The hot end that the hot end of pipe and the eighteenmo close pipe connects altogether, the cold end of the 19th switching tube, described
The low electricity of the cold end of 20th switching tube, the cold end of the 21st switching tube and the 22nd switching tube
Position end connects altogether, and the 15th switching tube cold end is connected with the hot end of the 19th switching tube, and the described 16th
Switching tube cold end is connected with the hot end of the 20th switching tube, the 17th switching tube cold end with it is described
The hot end of 21st switching tube is connected, and the eighteenmo closes the height of pipe cold end and the 22nd switching tube
Potential end is connected, and the 15th switching tube cold end, the sixteenmo close pipe cold end, the 17th switching tube
Cold end and the eighteenmo close pipe cold end and export the three-phase alternating current jointly.
In one embodiment, the control module includes signal acquisition unit, control unit and driving unit；
The output end of the signal acquisition unit is connected with the input terminal of described control unit, the output of described control unit
End is connected with the input terminal of the driving unit, the output end of the driving unit and the rectification module, the isolation module
It is connected with the inverter module；
The signal acquisition unit is by the rectification module, the voltage and current of the isolation module and the inverter module
Signal is transferred to described control unit by processing, and described control unit exports PWM modulation corresponding with voltage and current signals
For wave to the driving unit, the driving unit exports the PWM modulation wave after pressure stabilizing to the rectification module, the isolation module
With the inverter module, to complete the frequency and amplitude for controlling and adjusting the three-phase alternating current of entire circuit.
Existing beneficial effect is the utility model embodiment compared with prior art: the utility model not only has change
The functions such as pressure, isolation, energy transmission, can well adapt to a variety of work requirements.
Detailed description of the invention
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention,
For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram for the three-phase power electronic transformer that one embodiment of the utility model provides；
Fig. 2 is the electrical block diagram for the three-phase power electronic transformer that one embodiment of the utility model provides；
Fig. 3 is the structural schematic diagram for the control module that one embodiment of the utility model provides.
Specific embodiment
In order to make those skilled in the art more fully understand this programme, below in conjunction with attached in this programme embodiment
Figure, is explicitly described the technical solution in this programme embodiment, it is clear that described embodiment is this programme a part
Embodiment, instead of all the embodiments.Based on the embodiment in this programme, those of ordinary skill in the art are not being made
The range of this programme protection all should belong in every other embodiment obtained under the premise of creative work.
The specification and claims of this programme and term " includes " and other any deformations in above-mentioned attached drawing are
Refer to " including but not limited to ", it is intended that cover and non-exclusive include.In addition, term " first " and " second " etc. are for distinguishing
Different objects, not for description particular order.
The realization of the utility model is described in detail below in conjunction with specific attached drawing:
Fig. 1 shows a kind of structure of three-phase power electronic transformer provided by an embodiment of the present invention, in order to
Convenient for explanation, part relevant to the utility model embodiment is illustrated only, details are as follows:
As shown in Figure 1, a kind of three-phase power electronic transformer, three-phase power electronics provided by the utility model embodiment
Transformer circuit 1 includes rectification module 100, isolation module 200, inverter module 300 and control module 400.
Rectification module 100 accesses three-phase electricity, and rectification module 100 is connect with isolation module 200, isolation module 200 and inversion
Module 300 be connected, inverter module 300 export three-phase alternating current, control module 400 respectively with rectification module 100, isolation module
200 are connected with inverter module 300.
Control module 400 controls rectification module 100 and carries out rectification the first direct current electricity output of generation to the three-phase electricity in power grid
To isolation module 200, control module 400 controls isolation module 200 and carries out isolation processing the second direct current of generation to the first direct current
Second direct current is simultaneously output to inverter module 300 by electricity, and control module 400 controls inverter module 300 and carries out to the second direct current
Three-phase alternating current needed for inversion processing output.
In the utility model embodiment, 1 structure of three-phase power electronic transformer circuit uses three-stage topology structure, has good
Good control characteristic, has the function of transformation, isolation, energy transmission etc., can well adapt to a variety of work requirements.
In one embodiment of the utility model, control module 400 is based on DSP and FPGA dual processors control system.
As shown in Fig. 2, rectification module 100 includes 110 He of the first rectification unit in one embodiment of the utility model
First voltage regulation unit 120；First rectification unit 110 accesses three-phase electricity, the first rectification unit 110 and 120 phase of the first voltage regulation unit
Even.
First rectification unit 110 carries out rectification the first direct current of generation to the three-phase electricity in power grid and is output to described first surely
Unit 120 is pressed, the first voltage regulation unit 120 carries out steady pressure treatment to the first direct current, and by the first direct current electricity output after pressure stabilizing
To isolation module 200.
As shown in Fig. 2, in one embodiment of the utility model, the first rectification unit 110 include first switch tube Q1,
Second switch Q2, third switching tube Q3, the 4th switching tube Q4, the 5th switching tube Q5 and the 6th switching tube Q6.
The high potential of the hot end of first switch tube Q1, the hot end of second switch Q2 and third switching tube Q3
End is connected, and the cold end of first switch tube Q1 is connected with the hot end of the 4th switching tube Q4, the low electricity of second switch Q2
Position end is connected with the hot end of the 5th switching tube Q5, the cold end of third switching tube Q3 and the height electricity of the 6th switching tube Q6
Position end is connected, cold end, the cold end of the 5th switching tube Q5 and the low potential of the 6th switching tube Q6 of the 4th switching tube Q4
End is connected, the cold end of the cold end of first switch tube Q1, the cold end of second switch Q2 and third switching tube Q3
It is respectively connected to three-phase electricity.
In the present embodiment, the first rectification unit 110 uses first switch tube Q1, second switch Q2, third switching tube
Q3, the 4th switching tube Q4, the 5th switching tube Q5 and the 6th switching tube Q6 constitute the rectifier bridge of three-phase bridge topological structure, and first opens
Closing pipe Q1, second switch Q2, third switching tube Q3, the 4th switching tube Q4, the 5th switching tube Q5 and the 6th switching tube Q6 is 6
High voltage switch device, can be IGBT pipe, and the hot end of switching tube is the drain electrode of IGBT pipe, the low potential of switching tube
End is the source electrode of IGBT pipe.
In the present embodiment, control module 400 passes through control first switch tube Q1, second switch Q2, third switching tube
The connection or disconnection of Q3, the 4th switching tube Q4, the 5th switching tube Q5 and the 6th switching tube Q6 control the first rectification unit 110 for three
Phase electricity is converted into the first direct current.
As shown in Fig. 2, the first voltage regulation unit 120 includes first capacitor C1 in one embodiment of the utility model.
The hot end of the first end of first capacitor C1 and first switch tube Q1, the hot end of second switch Q2, the
The hot end of three switching tube Q3 connects altogether, the cold end of the second end of first capacitor C1 and the 4th switching tube Q4, the 5th switch
The cold end of pipe Q5, the 6th switching tube Q6 cold end connect altogether.
In the present embodiment, first capacitor C1 plays pressure stabilization function.
As shown in Fig. 2, isolation module 200 includes transformer 220, inversion list in one embodiment of the utility model
Member 210 and the second rectification unit 230.
The input terminal of inversion unit 210 is connected with the output end of rectification module 100, the output end of inversion unit 210 and change
The primary side winding of depressor 220 is connected, and the input terminal of the second rectification unit 230 is connected with the vice-side winding of transformer 220, and second
The output end of rectification unit 230 is connected with the input terminal of inverter module 300.
Inversion unit 210 carries out voltage inversion to the first direct current and exports the first high-frequency alternating current, and transformer 220 is to the
One high-frequency alternating current carry out voltage transformation export the second high-frequency alternating current, the second rectification unit 230 to the second high-frequency alternating current into
The second direct current is exported after the inversion of row voltage and pressure stabilizing.
In the present embodiment, transformer 220 is high frequency transformer, and is single-phase two-winding transformer.Inversion unit 210
Effect is high frequency DC/AC, and the effect of the second rectification unit 230 is high-frequency AC/DC.Inversion unit 210 is by the first direct current of input
Electrical modulation is that the first high-frequency ac voltage supplies transformer 220, by 220 transformation of transformer, wherein the no-load voltage ratio of transformer 200 by
The voltage class of specific application requires decision, realizes isolation, transformation, the energy transmission output of the first high-frequency ac voltage
Second high-frequency ac voltage is modulated to the second direct current by the second high-frequency ac voltage, the second rectification unit 230.
As shown in Fig. 2, inversion unit 210 includes the 7th switching tube Q7, the 8th in one embodiment of the utility model
Switching tube Q8, the 9th switching tube Q9 and the tenth switching tube Q10.
The hot end of 7th switching tube Q7 is connected with the hot end of the 8th switching tube Q8, and the 7th switching tube Q7's is low
Potential end connects altogether with the hot end of the 9th switching tube Q9 and is connected with one end of transformer primary winding, the 8th switching tube Q8's
Cold end connects altogether with the hot end of the tenth switching tube Q10 and is connected with the other end of transformer primary winding, the 9th switch
The cold end of pipe Q9 is connected with the cold end of the tenth switching tube Q10.
In the present embodiment, the 7th switching tube Q7, the 8th switching tube Q8, the 9th switching tube Q9 and the tenth switching tube Q10 can
To be IGBT pipe, the hot end of switching tube is the drain electrode of IGBT pipe, and the cold end of switching tube is the source electrode of IGBT pipe.
As shown in Fig. 2, the second rectification unit 230 includes the 11st switching tube in one embodiment of the utility model
Q11, the 12nd switching tube Q12, the 13rd switching tube Q13, the 14th switching tube Q14 and the second capacitor C2.
The first of the hot end of 11st switching tube Q11, the hot end of the 12nd switching tube Q12 and the second capacitor C2
End connects altogether, and the cold end of the 11st switching tube Q11 and the hot end of the 13rd switching tube Q13 connect simultaneously and transformer secondary altogether
One end of winding is connected, the cold end of the 12nd switching tube Q12 and the hot end of the 14th switching tube Q14 connect altogether and with change
The other end of depressor vice-side winding is connected, the cold end of the cold end of the 13rd switching tube Q13, the 14th switching tube Q14
It is connect altogether with the second end of the second capacitor C2.
In the present embodiment, the 11st switching tube Q11, the 12nd switching tube Q12, the 13rd switching tube Q13 and the 14th
Switching tube Q14 can be IGBT pipe, and the hot end of switching tube is the drain electrode of IGBT pipe, and the cold end of switching tube is IGBT pipe
Source electrode.
In the present embodiment, the effect of the second capacitor C2 is burning voltage.
As shown in Fig. 2, in one embodiment of the utility model, inverter module 300 include the 15th switching tube Q15,
Sixteenmo closes pipe Q16, the 17th switching tube Q17, eighteenmo and closes pipe Q18, the 19th switching tube Q19, the 20th switching tube
Q20, the 21st switching tube Q21 and the 22nd switching tube Q22.
The hot end of 15th switching tube Q15, sixteenmo close the hot end of pipe Q16, the 17th switching tube Q17
The hot end that hot end and eighteenmo close pipe Q18 connects altogether and is connected with the first end of the second capacitor C2, the 19th switch
The cold end of pipe Q19, the cold end of the 20th switching tube Q20, the 21st switching tube Q21 cold end and the 20th
The cold end of two switching tube Q22 connects altogether and is connected with the second end of the second capacitor C2, the 15th switching tube Q15 cold end with
The hot end of 19th switching tube Q19 is connected, and sixteenmo closes pipe Q16 cold end and the height electricity of the 20th switching tube Q20
Position end is connected, and the 17th switching tube Q17 cold end is connected with the hot end of the 21st switching tube Q21, and eighteenmo closes
Pipe Q18 cold end is connected with the hot end of the 22nd switching tube Q22, the 15th switching tube Q15 cold end, the tenth
Six switching tube Q16 cold ends, the 17th switching tube Q17 cold end and eighteenmo close pipe Q18 cold end and export jointly
The three-phase alternating current.
In the present embodiment, the 15th switching tube Q15, sixteenmo close pipe Q16, the 17th switching tube Q17, eighteenmo
Close pipe Q18, the 19th switching tube Q19, the 20th switching tube Q20, the 21st switching tube Q21 and the 22nd switching tube Q22
It can be IGBT pipe, the hot end of switching tube is the drain electrode of IGBT pipe, and the cold end of switching tube is the source electrode of IGBT pipe.
In the present embodiment, the 15th switching tube Q15, sixteenmo close pipe Q16, the 17th switching tube Q17, eighteenmo
Close pipe Q18, the 19th switching tube Q19, the 20th switching tube Q20, the 21st switching tube Q21 and the 22nd switching tube Q22
The current transformer for constituting three-phase four-wire system bridge topologies is based on DSP and FPGA two-ways cpu according to the work requirements of load
System provides ideal voltage source function and frequency conversion control function using corresponding control strategy.
As shown in figure 3, in one embodiment of the utility model, control module 400 include signal acquisition unit 410,
Control unit 420 and driving unit 430.
The output end of signal acquisition unit 410 is connected with the input terminal of control unit 420, the output end of control unit 420
It is connected with the input terminal of driving unit 430, the output end of driving unit 430 and rectification module 100, isolation module 200 and inversion
Module 300 is connected.
Signal acquisition unit 410 is by the voltage and current signals of rectification module 100, isolation module 200 and inverter module 300
It is transferred to control unit 420 by processing, control unit 420 exports PWM modulation wave corresponding with voltage and current signals to drive
Moving cell 430, driving unit 430 export the PWM modulation wave after pressure stabilizing to rectification module 100, isolation module 200 and inverter module
300, to adjust the frequency and amplitude of three-phase alternating current.
In the present embodiment, signal acquisition unit 410 acquires three-phase input voltage and electric current, 100 three-phase bridge of rectification module
Output voltage and electric current and the first voltage regulation unit 120 in first capacitor C1 input current；Signal acquisition unit 410 acquires
The input current of isolation module 200, the i.e. input current of inversion unit 210 also need the voltage and electricity at acquisition 220 both ends of transformer
The output electric current of H bridge in stream and the second rectification unit 230；Signal acquisition unit 410 acquires four bridge of three-phase in inverter module 300
The input voltage of arm configuration, the output voltage of input current and its inverting output terminal and output electric current.
In a particular application, as transformer in use, DSP and FPGA two-ways cpu system is based on, using two close cycles control
Policy calculation pwm pulse signal processed drives inverter module 300, and the second DC inverter that isolation module 200 is provided is three-phase
Alternating voltage provides ideal voltage for load.
In a particular application, as frequency converter in use, according to frequency conversion demand needed for loading, using voltage space vector pwm theory
It calculates pwm pulse signal and drives inverter module 300, the second DC inverter that isolation module 200 is provided is what load needed
The three-phase alternating voltage of frequency, voltage variable realizes frequency conversion function.
In one embodiment of the utility model, control module 400 further includes comparing unit and protection location, relatively list
The input terminal of member is connected with the signal output end of signal acquisition unit, the output end and the receiving end phase of control unit of comparing unit
Even, the input terminal of protection location is connected with the control signal output of control unit.
In the present embodiment, protection location is the switching group that the three-phase being arranged in power grid is electrically accessed place, signal acquisition list
The collected rectification module of member, isolation module and inverter module voltage and current signals are transferred to comparing unit, in comparing unit
In make comparisons with preset voltage, current value range, when exceed preset voltage, current value range when, comparing unit will compare
Consequential signal is sent to control unit, and control unit control and protection unit disconnects, and then disconnects the input of three-phase electricity.
In one embodiment of the utility model, signal acquisition unit 410 includes sensor subunits and the first FPGA
Control subelement.
The input terminal of sensor subunits is the input terminal of signal acquisition unit, the output end of sensor subunits and first
The input terminal that FPGA controls subelement is connected, and the output end that the first FPGA controls subelement is the output end of signal acquisition unit.
The sensor unit sends the voltage and current signals of acquisition rectification module, isolation module, inverter module to
First FPGA controls subelement, and the first FPGA control subelement is filtered the voltage and current signals, and will
Treated, and voltage and current signals are transferred to described control unit.
In one embodiment of the utility model, control unit 420 includes DSP processing subelement and the 2nd FPGA control
Subunit.
The input terminal that DSP handles subelement is the input terminal of control unit, and DSP handles the output end and second of subelement
The input terminal that FPGA controls subelement is connected, and the output end that the 2nd FPGA controls subelement is the output end of control unit.
The voltage and current signals of DSP processing subelement reception signal acquisition unit and preset DC voltage
Value, is adjusted by outer voltage pi regulator, and current inner loop PR controller is adjusted, and obtains different duty ratios, and by duty ratio
It is transferred to the 2nd FPGA control subelement, obtains the pwm signal of rectification module by the processing of the 2nd FPGA control subelement, and
The pwm signal of rectification module is transmitted to driving unit.
2nd FPGA control subelement utilize two-track phase control algorithm, by control isolation module in switching tube on-off come
The size and Orientation of three-phase power electronic transformer transimission power is controlled, and generates the pwm signal of corresponding isolation module, and will
The pwm signal of isolation module is transmitted to driving unit.
For inverter module:
1) be in transformer state if necessary to three-phase power electronic transformer: DSP handles subelement according to signal acquisition
The voltage and current signals of the collected inverter module of unit obtain inverse cascade H using voltage, current double closed-loop PI controller
The duty ratio of bridge, the fpga chip being sent into core board, generates the pwm signal of inverter module, and by the pwm signal of inverter module
It is transmitted to driving unit.
2) be in frequency converter state if necessary to three-phase power electronic transformer: DSP handles subelement according to signal acquisition
Then the threephase stator electric current of the collected induction machine of unit, stator voltage obtain two after the transformation of three phase transformation two-phases
Electric current and component of voltage under phase rest frame, and by under two-phase stationary coordinate system electric current and component of voltage be input to magnetic linkage
In observer.Pass through the amplitude and field orientation angle of flux observer acquisition rotor flux and actual torque value.DSP processing
Collected motor velocity signal and given speed signal subtraction, difference are adjusted to obtain ideal by subelement by revolving speed PI
The difference of torque value, desired torque value and actual torque value passes through T shaft current pi regulator, obtains torque component of voltage, at DSP
It is poor that the actual magnitude and ideal rotor flux amplitude for the rotor flux that reason subelement exports flux observer are made, difference warp
M shaft current PI is crossed to adjust to obtain excitation transformation component.Torque component of voltage and excitation transformation component in park inverse transformation by obtaining
Component of voltage under to two-phase stationary coordinate system, and it is sent to the 2nd FPGA control subelement.2nd FPGA controls subelement
Using SVPWM modulation algorithm, the pwm signal of inverter module is obtained, driving unit drives the inverter module defeated according to pwm signal
Out frequency, voltage variable three-phase alternating voltage.
In one embodiment of the utility model, driving unit 430 includes the 3rd FPGA control subelement and transistor
Drive subelement.
The input terminal that 3rd FPGA controls subelement is the input terminal of driving unit, and the 3rd FPGA controls the output of subelement
End is connected with the input terminal of transistor driving subelement, and the output end of transistor driving subelement is the output of the driving unit
End.
3rd FPGA controls the pwm signal of subelement reception control unit, and by signal condition, by treated, PWM believes
It number is transmitted to transistor driving subelement, transistor driving subelement drives rectification module, isolation module and inverter module work.
It should be noted that the identical port of label or pin are to be connected in the utility model the description and the appended drawings.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (9)
1. a kind of three-phase power electronic transformer, which is characterized in that including rectification module, isolation module, inverter module and control
Module；
The rectification module accesses three-phase electricity, and the rectification module connects with the isolation module, the isolation module with it is described
Inverter module is connected, and the inverter module exports three-phase alternating current, the control module respectively with the rectification module, it is described every
It is connected from module with the inverter module；
The control module control the rectification module to the three-phase electricity in power grid carry out rectification generate the first direct current be output to
The isolation module, the control module control the isolation module and carry out isolation processing generation second to first direct current
Second direct current is simultaneously output to the inverter module by direct current, and the control module controls the inverter module to described
The three-phase alternating current needed for second direct current carries out inversion processing output.
2. three-phase power electronic transformer as described in claim 1, which is characterized in that the rectification module includes the first rectification
Unit and the first voltage regulation unit；
First rectification unit accesses the three-phase electricity, and first rectification unit is connected with first voltage regulation unit；
First rectification unit to the three-phase electricity in power grid carry out rectification generate first direct current be output to it is described
First voltage regulation unit, first voltage regulation unit carry out steady pressure treatment to first direct current, and by described the after pressure stabilizing
One direct current is exported to the isolation module.
3. three-phase power electronic transformer as claimed in claim 2, which is characterized in that first rectification unit includes first
Switching tube, second switch, third switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube；
The high potential of the hot end of the first switch tube, the hot end of the second switch and the third switching tube
End is connected, and the cold end of the first switch tube is connected with the hot end of the 4th switching tube, the second switch
Cold end be connected with the hot end of the 5th switching tube, the cold end of the third switching tube is opened with the described 6th
The hot end for closing pipe is connected, the cold end of the 4th switching tube, the cold end of the 5th switching tube and described the
The cold end of six switching tubes is connected, the cold end of the first switch tube, the cold end of the second switch and institute
State the cold end access three-phase electricity of third switching tube.
4. three-phase power electronic transformer as claimed in claim 3, which is characterized in that first voltage regulation unit includes first
Capacitor；
The hot end of the first end of the first capacitor and the first switch tube, the second switch hot end,
The hot end of the third switching tube connects altogether, the cold end of the second end of the first capacitor and the 4th switching tube,
The cold end of 5th switching tube, the cold end of the 6th switching tube connect altogether.
5. three-phase power electronic transformer as described in claim 1, which is characterized in that the isolation module include transformer,
Inversion unit and the second rectification unit；
The input terminal of the inversion unit is connected with the output end of the rectification module, the output end of the inversion unit with it is described
The primary side winding of transformer is connected, and the input terminal of second rectification unit is connected with the vice-side winding of the transformer, described
The output end of second rectification unit is connected with the input terminal of the inverter module；
The inversion unit carries out voltage inversion to first direct current and exports the first high-frequency alternating current, and the transformer is to institute
It states the first high-frequency alternating current and carries out voltage transformation the second high-frequency alternating current of output, second rectification unit is to second high frequency
Alternating current exports second direct current after carrying out voltage inversion and pressure stabilizing.
6. three-phase power electronic transformer as claimed in claim 5, which is characterized in that the inversion unit includes the 7th switch
Pipe, the 8th switching tube, the 9th switching tube and the tenth switching tube；
The hot end of 7th switching tube is connected with the hot end of the 8th switching tube, the 7th switching tube it is low
Potential end connects altogether with the hot end of the 9th switching tube and is connected with one end of the transformer primary winding, and the described 8th
The hot end of the cold end of switching tube and the tenth switching tube connects altogether and the other end with the transformer primary winding
It is connected, the cold end of the 9th switching tube is connected with the cold end of the tenth switching tube.
7. three-phase power electronic transformer as claimed in claim 5, which is characterized in that second rectification unit includes the tenth
One switching tube, the 12nd switching tube, the 13rd switching tube, the 14th switching tube and the second capacitor；
The first of the hot end of 11st switching tube, the hot end of the 12nd switching tube and second capacitor
End connects altogether, the cold end of the 11st switching tube and the hot end of the 13rd switching tube connect altogether and with the transformation
One end of device vice-side winding is connected, and the cold end of the 12nd switching tube and the hot end of the 14th switching tube are total
It connects and is connected with the other end of the transformer secondary winding, the cold end of the 13rd switching tube, the described 14th are opened
The second end of the cold end and second capacitor that close pipe connects altogether.
8. three-phase power electronic transformer as described in claim 1, which is characterized in that the inverter module is opened including the 15th
Guan Guan, sixteenmo close pipe, the 17th switching tube, eighteenmo close pipe, the 19th switching tube, the 20th switching tube, the 20th
One switching tube and the 22nd switching tube；
The hot end of 15th switching tube, the sixteenmo close the hot end of pipe, the 17th switching tube
The hot end that hot end and the eighteenmo close pipe connects altogether, the cold end of the 19th switching tube, described second
The cold end of the cold end of ten switching tubes, the cold end of the 21st switching tube and the 22nd switching tube
It connects altogether, the 15th switching tube cold end is connected with the hot end of the 19th switching tube, and the sixteenmo closes
Pipe cold end is connected with the hot end of the 20th switching tube, the 17th switching tube cold end and described second
The hot end of 11 switching tubes is connected, and the eighteenmo closes the high potential of pipe cold end and the 22nd switching tube
End is connected, and the 15th switching tube cold end, the sixteenmo close pipe cold end, the low electricity of the 17th switching tube
Position end and the eighteenmo close pipe cold end and export the three-phase alternating current jointly.
9. three-phase power electronic transformer as described in claim 1, which is characterized in that the control module includes signal acquisition
Unit, control unit and driving unit；
The output end of the signal acquisition unit is connected with the input terminal of described control unit, the output end of described control unit with
The input terminal of the driving unit is connected, the output end of the driving unit and the rectification module, the isolation module and institute
Inverter module is stated to be connected；
The signal acquisition unit is by the voltage and current signals of the rectification module, the isolation module and the inverter module
It is transmitted to described control unit by processing, described control unit exports PWM modulation wave corresponding with voltage and current signals extremely
The driving unit, the driving unit export the PWM modulation wave after pressure stabilizing to the rectification module, the isolation module and institute
Inverter module is stated, to complete the frequency and amplitude for controlling and adjusting the three-phase alternating current of entire circuit.
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| CN201821908484.XU CN209250500U (en) | 2018-11-19 | 2018-11-19 | A kind of three-phase power electronic transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109149957A (en) * | 2018-11-19 | 2019-01-04 | 河北工程大学 | A kind of three-phase power electronic transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109149957A (en) * | 2018-11-19 | 2019-01-04 | 河北工程大学 | A kind of three-phase power electronic transformer |
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